Electric heater



0. P. SCOTT.

ELECTRIC HEATER.

I APPLICATION FILED OCT. 17, 1919. RENEWED AUG. 4.1921.

Patented Dec. 27, 1921.

INVENTOR 611B Jcqtb W w W M WITNESSES T ATTORNEYS PATENT OFFICE.

OLIVER r mnr soon, or some, 'wasnmeroir.

ELECTRIC IHI'LA'JJER.v

Specification of Letters Patent. Patented Dec 27, 1921,

Application filed October 17, 1919, Serial No. 331,336. Renewed August 4, 1921.. Serial No. 489,901.

' To all whom it may concem:

Be it known that I, OLIVER PERRY Soon, a citizen ofthe United States, and a resident of Tacoma, in the county of Pierce and Stateof Washington,-have invented certain new and'useful Im rovements in Electric Heaters, of which t e following is a specification. a

My invention relates to electric heaters adapted for the heating of air or water, and a purpose of my invention is the provision of an electric heater of simple and substantial construction, wherein the elements comprised in the heater are exposed to facilitate the repairing thereof. I Itis also the purpose of my invention to provide an electri heater which consumes a minimum quantity of current, the construction'of the heater being such that it may be used either for heating water or air.

I will describe two forms of electric heaters embodying my invention and will then point out the novel features in the claim.

In the accompanying 'drawings:

Figure 1 is-afvie'w showing a flue of a hot air heating system having applied thereto one form of electricheater embodying my invention;

Fig. 2 is a view showing in side elevation and partly in section the heater shown in Fig. 1;

ig. 3 is an end elevation of Fig. 2;- Fig. 4 is a view showing a hot water tank 7 having applied to the feed pipe thereof tric heater embo another form of electric heater embodying my invention;

Fig. 5 is a longitudinal sectional view of the heater shown in Fig. 4; and

Fig. 6 is a transverse sectional view of eferring specifically to the drawings, and

particularly to F 2, the first form of elecing my invention comprises a tube T formed of insulating mate rial such as clay, porcelain, concrete or the like and having coiled spirally .thereabout an electric heating unit H. The heating unit H consists of a single length of conducting wire which is coiled upon itselfand secured at its opposite ends to the tube T by means of binding posts P. The bindingeposts P extend through the wall of the tu T and form an attaching means for conducting wires W which supply current to the heating unit tothereby heat the latjust described in applied position within a flue F of a hot-air heating system. B designates the boiler of this heating system which supplies hot air to a room through the mediurnof the flue F, the passage of hot air through the flue being controlled by, a damper D. The electric heater is supported within the flue F by means of brackets 15 and 16 which are secured to the walls of the flue and to the opposite ends of the tube T so that the heater is disposed longitudinally of the flue. When the heatin system is not in use, hot-air may be supp ied to a room by means of the electric heater, it being understood that when the draft D is opened a current of air is created within the flue F by the heat. generated from the heating unit H.

Referring'now to Figs. 5 and 6, I have herein shown another form of electric heater embodying my invention, wherein T designates a tubular support formed of insulating material and about which a heating unit H is coiled. The heating unit H is the same as the heating unit H in the other form of my invention and is secured at its opposite ends to the support by binding posts P. As

illustrated to advantage in Fig. 6, the support T is in the form of a Patte cross in section to provide longitudinally extending ribs 17', which are co-extensive in length with the support. A shown in F igI 5, the heating unit H is coiled about and supported'by the ribs 17 so that practically the entire surface of the heating unit is exposed" a, rigid support for the asbestos cover 21, while the latter serves to prevent radiation of heat from the heating unit H.

Referring now to Fig. 4, I have herein shown a hot water tank A'to which water is supplied by means of a pipe K. In the applied position of the second form of heater the tubular support T snugly receives the pipe K, as illustrated to advantage in Figs. 5 and 6..

When current is supplied to the heating unit H the heatgenerated by the current is transmitted to the pipe K thereby effectively heating thewater as it is supplied to the tank A. In Fig. 4, I have shown the asbestos covering 21 extended beyond the support T so as to cover a major portion of the pipe K. The covering 21 is supported in proper position with respect to the pipe K by means of brackets 22 and 23 which are in turn supported by the tank A.

Although I have herein shown and described two forms of electric heaters and' two methods of heating, it is to be understood that various changes and modifications may be made without departing from the spirit of the invention and the spirit and scope of the appended claim.

.Having thus described my invention, I claim: v i

An electric heater comprising a tube formed of insulating material, longitudinally extending ribs formed exteriorlyiof said tube, circular heads formed on the opposite ends of said tube and having perforations formed therein, a heating unit arranged about said tube and engaging said ribs, ametallic casing surrounding said tube and supported upon said heads in a manner to dispose a major portion of the casing in spaced relation to the tube, and heat insulating material surrounding said casing.

OLIVER. PERRY scorr. 

